East Asian Language Support

http://en.wikipedia.org/wiki/Help:Multilingual_support_%28East_Asian%29

Windows XP and Server 2003

Windows XP and Server 2003 include native support for East Asian languages. To install the files, check the Install files for East Asian languages in the Control Panel > Regional and Language Options > Languages. Note that a minimum of 230 MB of disk space is required and that the Windows CD-ROM is needed while installing support for East Asian languages using this method. (Non-East Asian localizations only)

Instructions for Windows XP and Server 2003

Alternatively, you can use the installation packages intended for 98/NT by following these links:

Simplified Chinese.

Traditional Chinese.

http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=deb6731a-ca36-47a3-b4a0-2a1d19eefa05